#include "zgl.h"

void glGetIntegerv(int pname, int* params) {
  GLContext* c = gl_get_context();

  switch (pname) {
    case GL_VIEWPORT:
      params[0] = c->viewport.xmin;
      params[1] = c->viewport.ymin;
      params[2] = c->viewport.xsize;
      params[3] = c->viewport.ysize;
      break;
    case GL_MAX_MODELVIEW_STACK_DEPTH:
      *params = MAX_MODELVIEW_STACK_DEPTH;
      break;
    case GL_MAX_PROJECTION_STACK_DEPTH:
      *params = MAX_PROJECTION_STACK_DEPTH;
      break;
    case GL_MAX_LIGHTS:
      *params = MAX_LIGHTS;
      break;
    case GL_MAX_TEXTURE_SIZE:
      *params = 256; /* not completely true, but... */
      break;
    case GL_MAX_TEXTURE_STACK_DEPTH:
      *params = MAX_TEXTURE_STACK_DEPTH;
      break;
    default:
      gl_fatal_error("glGet: option not implemented");
      break;
  }
}

void glGetFloatv(int pname, float* v) {
  int i;
  int mnr = 0; /* just a trick to return the correct matrix */
  GLContext* c = gl_get_context();
  switch (pname) {
    case GL_TEXTURE_MATRIX:
      mnr++;
    case GL_PROJECTION_MATRIX:
      mnr++;
    case GL_MODELVIEW_MATRIX: {
      float* p = &c->matrix_stack_ptr[mnr]->m[0][0];
      ;
      for (i = 0; i < 4; i++) {
        *v++ = p[0];
        *v++ = p[4];
        *v++ = p[8];
        *v++ = p[12];
        p++;
      }
    } break;
    case GL_LINE_WIDTH:
      *v = 1.0f;
      break;
    case GL_LINE_WIDTH_RANGE:
      v[0] = v[1] = 1.0f;
      break;
    case GL_POINT_SIZE:
      *v = 1.0f;
      break;
    case GL_POINT_SIZE_RANGE:
      v[0] = v[1] = 1.0f;
    default:
      fprintf(stderr, "warning: unknown pname in glGetFloatv()\n");
      break;
  }
}
